While two-time GSW Tonalist's Shape (Tonalist) is favored at 9-5 on the morning line for Saturday's GI Coaching Club American Oaks at Saratoga, she'll have to fend off several well-bred and promising up-and-comers if she's to get the job done. Perhaps the most formidable challenger is WinStar Stablemates Racing's Paris Lights (Curlin). The Bill Mott trainee was third in a sloppy-track sprint at Gulfstream on debut Apr. 26, but took a big step forward to romp on the stretch-out at Churchill May 31 and then paired up 85 Beyer Speed...